(2E)?-5-?[3-?[2-?(3,?3-?Dimethyl-?2-?oxiranyl)?ethyl]?-?3-?methyl-?2-?oxiranyl]?-?3-?methyl-?2-?pentenoic-d3 Acid is a by-product during the synthesis of trans-trans-10,11-Epoxy Farnesenic Acid-d3 Methyl Ester (E589402), a labelled trans-trans-10,11-Epoxy Farnesenic Acid Methyl Ester (E589400). trans-trans-10,11-Epoxy Farnesenic Acid Methyl Ester is a metabolite (2E,6E)-Farnesenic Acid.